Probing the braneworld hypothesis with a neutron-shining-through-a-wall experiment

Abstract

The possibility for our visible world to be a 3-brane embedded in a multidimensional bulk is at the heart of many theoretical edifices in high-energy physics. Probing the braneworld hypothesis is thus a major experimental challenge. Following recent theoretical works showing that matter swapping between braneworlds can occur, we propose a neutron-shining-through-a-wall experiment. We first show that an intense neutron source such as a nuclear reactor core can induce a hidden neutron flux in an adjacent hidden braneworld. We then describe how a low-background detector can detect neutrons arising from the hidden world and quantify the expected sensitivity to the swapping probability. As a proof of concept, a constraint is derived from previous experiments.

arXiv comment12 pages, 4 figures, final version published in Physical Review D

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• Experimental Search for Neutron to Mirror Neutron Oscillations as an Explanation of the Neutron Lifetime Anomaly
• Searching for Hidden Neutrons with a Reactor Neutrino Experiment: Constraints from the STEREO Experiment
• Search for passing-through-walls neutrons constrains hidden braneworlds
• Dark sectors in neutron-shining-through-a-wall and nuclear absorption signals
• Probing neutron-hidden neutron transitions with the MURMUR experiment
• Lindblad and Bloch equations for conversion of a neutron into an antineutron
• A search for neutron-to-hidden-neutron oscillations in a ultra-cold neutron beam
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• Stellar Light Scattering as a Probe for a Braneworld-Induced Baryogenesis Scenario